Yikes, forgot about a small point, so will make this short:
The main reason that tipped me over the edge of not banning Sneasel is the following: most arguments for its ban can be summed up to: "it's the fastest relevant offensive threat that doesn't have 5 million checks." As long as you're not something like Swellow or Fletch which gets hard walled by entire types (which can be done also by offensive mons, hence why they do not qualify), it's obvious that if you're the fast threat and it's out against most offensive Pokemon, it's gonna get a kill. That doesn't necessarily mean it's broken, but it's apparently what everyone believes makes a broken Pokemon. If Sneasel's gone, it's gonna be the next speed tier mons, Tauros / Archeops that have these qualities. Then the next up.
This is not a slippery slope argument. It looks similar but it's not. It's an inductive argument, for which the inductive step only fails if all proper offensive mons are very slow. There's always a list of Pokemon that have limited amount of switches. In fact, most reasonably successful offensive Pokemon in any tier have this quality, so it's gonna just be easier taking out the short list of Pokemon which get hard walled by whole types yet remain effective for a quaint reason (usually they can only act as a pure "win condition" where they only start putting in work after certain mon is whittled, but is extremely efficient otherwise). There's always going to be the fastest speed tier among these offensive Pokemon that have the tools to punish most switch-ins. And such fastest Pokemon will always have these quality that people's claiming that makes Sneasel broken. It's gonna outspeed a vast majority of the offensive threat and it's going to 2hko most switches except defensive ones, or a very restrictive, short list of offensive threats that "limit teambuilding." And only way to beat them would be to either build slower teams aka. balance / stall / bulky offense that eats a hit and KO back, or carry priority moves or Scarfers for offense. For anyone thinking I'm just exaggerating, I'm just going to point out that Archeops really was this the case before neither Sneasel nor Tauros was popular, and everyone had to carry like one of the 2 aqua jetters (that couldn't switch in properly), 3 of the rock types, revenge, or tank a hit then kill. Kind of similar to how Sneasel requires like 2 of the fighting-type priority Pokemon, 2 of the GOOD fairy-types, or revenge, or tank a hit then kill.
So are all such Pokemon banworthy? Should we make it so that all Pokemon without a proper switch-in is banned unless they're slower than Sawk or something? Would that really make the tier fun, and would that be necessary?
Also, before anyone points out the philosophy of "If mon Y is broke after banning X, we'll ban it too, this point is utterly invalid," I am aware of that protocol. Notice how I'm not claiming that Tauros will be broken after the ban. I'm just pointing out the fact that whatever qualities people have been stating previously in the thread that makes Sneasel broken, will happen with at least something in the tier, and there will be always something that does what it does, which most people are claiming is the reason why Sneasel is broken. If not him, then something else. It is an eventuality unless we go to extreme measures banning half of the offensive metagame, and we'll be left with fastmons lose to bulkymons, bulkymons lose to wallbreakers, wallbreakers lose to fastmons, making the game trivial and easy. Some non-wincon attackers should be faster, some not. Certain types will be punished because of those who are faster and thus easier to fit. And there'll be certain defensive Pokemon many be relied on "limiting teambuilding", whether it be a meta centralized around Sneasel and grounded on Mawile and M-Audino, or whether it be a meta centralized Tauros and grounded on Regirock / Carracosta. I am simply pointing out that the idea that just because we ban Sneasel, no offensive Pokemon will be able to outspeed majority of the tier, can always spam a hard-hitting STAB, has good coverage, and thus heavily pressure offense, is laughable at best.